Eliot did some rework on the sound plugin a few months back. How new is
your VM ?

Best,
Karl


On Fri, Oct 9, 2020 at 6:19 PM Thiede, Christoph <
Christoph.Thiede at student.hpi.uni-potsdam.de> wrote:

> Hi all,
>
>
> for a test, I am storing sounds into a ByteArray and read them again. This
> works well for PluckedSounds, for example, but I found some strange
> behavior when doing the same with SampledSounds:
>
>
> sound := SampledSound new
>
> setSamples: SampledSound coffeeCupClink
>
> samplingRate: 12000.
>
>
> bytes := ByteArray streamContents: [:stream |
>
> sound storeWAVSamplesOn: stream].
>
>
> outputSound := SampledSound fromWaveStream: bytes readStream binary.
>
>
> After running this script, I would expect outputSound to have the same
> samples as sound. But actually, every byte in the SoundBuffer appears
> twice! Still, playing the sound does not sound differently in my ears. I
> traced the issue down and found out that #mixSampleCount:into:startingAt:leftVol:rightVol:
> is writing every byte four times on the stream - two would be okay for left
> and right channel, but I do not understand the four. I reproduced the issue
> both on Windows and Ubuntu (WSL). Disabling the primitive did not help
> either.
>
>
> So I am wondering: Is this a bug or totally fine (because you cannot hear
> a difference anyway)? If the latter is the case, how can I compare the
> sounds else in a reliable way? If I store outputSound again, the number
> of bytes is doubled again, so if you do certain operations, your image will
> blow up exponentially ...
> <http://www.hpi.de/>
>
> For the context of this question, see also:
> http://forum.world.st/Overriding-in-Graphics-and-Sounds-td5122783.html
>
> Best,
> Christoph
>
>
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